Osaka Castle, or “Osaka-jo” in Japanese, is certainly one of the most famous landmarks in Japan, and for good reason. This five-story castle is one of the most visually spectacular creations in the country, with a history that dates back almost 450 years!
Visitors to Osaka Castle can enter inside, which currently operates a historical museum, for a small fee (15 years and younger can enter for free), with group discounts available. On each floor inside the castle are a wide variety of artefacts detailing the extensive history of Osaka and the castle itself. While not all the artefact information is available in English, there are leaflets available that explain much of the exhibits. On the top floor visitors can catch a breathtaking view of the surrounding areas, taking in the parks and cityscapes.
https://osaka-info.jp/en/page/osaka-castle